On This Day: Due to the post-Independence Day admission of Hawaii as the 50th U.S. state on August 21, 1959, the

7/4 (1960): Due to the post-Independence Day admission of Hawaii as the 50th U.S. state on August 21, 1959, the 50-star flag of the United States debuts in Philadelphia, almost ten and a half months later (see Flag Acts (United States)).